CVE-2017-20223

Telesquare SKT LTE Router SDT-CS3B1 Insecure Direct Object Reference

Telesquare SKT LTE Router SDT-CS3B1 firmware version 1.2.0 contains an insecure direct object reference vulnerability that allows attackers to bypass authorization and access resources by manipulating user-supplied input parameters. Attackers can directly reference objects in the system to retrieve sensitive information and access functionalities without proper access controls.

Affected

Telesquare · SDT-CS3B1

CVSS v4.0 VULNCHECK

9.3 CRITICALCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 VULNCHECK

9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.53% chance of exploitation in the next 30 days, 44th percentile

Published

2026-03-16

Updated

2026-04-07

Proof-of-concept exploits (2)

• https://www.exploit-db.com/exploits/43402/
• https://packetstormsecurity.com/files/145551

Security advisories

• https://exchange.xforce.ibmcloud.com/vulnerabilities/136993
• https://www.exploit-db.com/exploits/43402
• https://www.vulncheck.com/advisories/telesquare-skt-lte-router-sdt-cs3b1-insecure-direct-…
• https://www.zeroscience.mk/en/vulnerabilities/ZSL-2017-5445.php
• https://cxsecurity.com/issue/WLB-2017120297

References

• CVE Record
• NVD entry